Question

How does ion size affect conductivity $?$

Answer 1

First we know that an ion is a positively or negatively charged atom or group of atoms. The ability or power of a substance to conduct or transmit heat, electricity, or sound is known as conductivity of a given substance. Its S.I unit is Siemens per meter $(S/m)$ and this phenomenon produces an electric current and is called ionic conduction in chemistry.

Complete answer:
In water, the ions are responsible for passing electricity from one to the next. Then higher concentrations of ions in water increase its ability to conduct electricity because the electrical current is transported by the ions in solution. Hence, its conductivity increases as the concentration of ions increases. Thus, conductivity increases as water dissolves ionic compounds. Hence, as the number of ions in any solution is large then its conductivity is also high.
Small ions have small areas. Then there is less resistance as they move through the solution. Since conductivity is inversely proportional to resistivity. Thus, small ions have high charge density.
Hence the smaller ions have greater conductivity than larger ions.

Note:
Ions are classified into two types, namely cations or positively charged ions and anions or negatively charged ions. Also note that an electron is a negatively charged particle, so it is responsible for the formation of ions. Silver has the highest electrical conductivity of all metals and table salt (Sodium chloride) is an example of an ionic compound with strong conductivity.